Carbureter for explosive-engines.



M. L. KELLER. OARBURETER FOR EXPLOSIVE ENGINES. APPLICATION FILED 001228, 1913.

Patented Feb. 23, 1915.

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Specificaticnot Letters Patent.

Patented Feb. 23, 1915.

Application filed October 28, 1913. Serial No. 797,793.

To all whom it may concern:

Be it knownthat li, Marcus L. KELLER, a citizen of the United States, residing at Toone, in the county of Hardeman, Stateof Tennessee, have invented certain new and useful Improvements in Garbureters for Explosive-Engines; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the "art to which it appertains to make and use the same.

This invention explosive engines.

The object of the invention resides in the Y provision of a carbureter in which only a portion of the air drawn in through the air intake will sweep the gasolene nozzle, the portion of the air which does not directly engage and take up the gasolene unitingwith the mixture permeated with gasolene in.

the mixing chamber elf-the \carbureter between the gasolene'nozzle and the manifold A further object of the invention resides in the provision of an improved form of air valve for efi ecting air into the carburetor in two separate portions one of which is adapted to sweep the gasolene nozzle and the other to enter the mixin chamber and there unite with the mixture ormed by the first named portion of air and the gasolene taken up thereby.

With the above and other objects in view-- the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claim.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which- Figure 1 is. a vertical section earbureter constructed in accordance with the invention; Fig. 2, a view looking at the right hand side of Fig. 1;-Fig. 3, a view similar to Fig. 2 showing the relation of the auxiliary air ports of the throttle and casing when. the throttle is fullyopened; Fig. 4, a section on the line 44 of Fig. 1; Fig. 5, a section on the line 55 of Fig. 1, and Fig. 6; a detail perspective view of the air valve detached.

Referring to the drawings the carbureter relates to carbureters for.

a carbureter embodying the through v a shown as comprising a casing A which includes a gasolene reservoir 10 and a mix mg chamber 11 which communicates with the manifold of the engine. The wall of the mixing chamber 11 is curved outwardly from its upper end and then curved in- Wardly' as at 12 into the reservoir '10. The

insertion of the valve seat 14. Disposed against the bottom of the valve seat 14- is an air intake pipe 17 provided with a damper 18 at its free end.

Extending through the pipe 17 and longitudinally through the valve seat 14 is a gasolene nozzle 19 which is provided with spider arms 20 united to the inner wall of the valve seat 14:, one of said arms being provided with a passage 21 which communicates at one end with the bore of the nozzle 19 and at its other end with I the wall of the valve seat and whichglast named passage communicates with the gasogasolene through by a-needle valve a passage 22 formedin lene reservoirlO. Flow of the nozzle 19 is controlled 23 mounted tooperate in the bore of the nozzle 19. The nozzle 19 is provided with a circumscribing flange 24 which bears against the pipe 17 and serves to hold the latter in place and at the same time per mitting radial adjustment of said pipe. Pivotally mounted in the gasolene reservoir 10 is a float valve 25 which controls the supply of gasolene to the reservoir usual and well known manner. Disposed within the mixing chamber 11 is an air valve B which embodies adisk 26 having a central opening 27. Thisdisk 26 normally seats against the valve seat it and is held this position by a spring 28 which bears at one end against said disk and at its other end against afflange 29 formed on an adjusting screw 30 threaded'in the top wall of the casing A and by means of. which the tension of the spring 28 may be adjusted. Secured to the bottom of the disk 26 .is a tubular member including a cylindrical portion 31 slidable on the nozzle 19 and a flared portion 32 which is directly connected to the bottom of the beveled end 15 of. v

' the disk 26 above the disk 26 the throttle 35 is provided with an and provided with a plurality of air ports33. The cylindrical portion 31 of the tubular member serves to guide. the disk 26 in its movements to and from the valve seat 14. The mixing chamber 11 terminates in a laterally directed portion 34 and disposed wi hin this mixing chamber and in line with the bore of the lateral portion 34: is a cylindrical throttle 35 which is provided with a bearin'g stem 36 rotatably mounted in the top wall of the casing. Secured to this hearing stem 36 is a throttle lever '37. The lower end of "the throttle 35. is opened so that the interior of the throttle communicates with the mixing chamber '11. The side wall of openin at which is adapted to he brought into will out of registration with the bore of the extension 34: by the rotation "of the throttle through the instrumentality of the lever 37. Formed in the side wall of the mixing chamber in line with the bore of the extension 3t is a plurality of orts 39 with which a port 40 formed in t e throttle 35 is adapted to successively register when the throttle is moved to full open position.

in the operation of the carbureter it will be apparent that when the engine is running slow little 'or no lift woul be. exerted upon the disk 26 so that all air will pass through the ports 33 and sweep the gasolene nozzle 19 at its delivery end. As the speed of the engine increases however upon -opening the throttle or advancing the spark the richness of the mixture mus't be materially decreased and as such increase of speed will lift the disk 26 sharply from its seat air will sweep between the outer edge of the disk and the upper end of the seat 14 in addition to passing through the ports 33. This air that passes between the edges of the disk 26 and the seat ll will unite with the mixture formed by the air passing through the ports 33 and sweeping the gasolene nozzle and thus materially decrease the richness of such mixture. The richness of the mixture is adapted to be further decreased as the throttle is opened by air drawn through the registering ports 39 and 40, the quantity of such air being proportionate to the extent to which the throttle is opened.

The mixture of air and gasolene in the mixing chamber 11 is enhanced by providing the wall of said mixing chamber with spiral corrugations M which serve to impart a whirling or rotary motion to the air entering the chamber.

What is claimed is:

A 'carbureter comprising a casing having a liquid fuel chamber and a mixing chamber, said mixing chamber having a portion of its wall extended into the fuel chamber, a valve seat threaded in the extended por tion of the wall of the mixing chamber and through the wall of the fuel chamber, said valve seat forming an air intake for the mixing chamber, a fuel nozzle mounted longitudinally of the valve seat, a spring controlled valve supported and comprising a disk having a central opening through which the fuel nozzle projects, and a tubular portion slidable on the fuel nozzle having its inner end flared and connected to the disk, said inner end being provided with air ports.

In testimony whereof, I afiix my signature, in the presence of two witnesses.

MARGUS L. KELLER.

Witnesses:

S. P. HARRIS, T. H. Ransom.

on the valve seat 

